DeleteTopic deletes the topic with the given name. Returns NOT_FOUND if the topic
does not exist. After a topic is deleted, a new topic may be created with
the same name; this is an entirely new topic with none of the old
configuration or subscriptions. Existing subscriptions to this topic are
not deleted, but their topic field is set to _deleted-topic_.

Publish adds one or more messages to the topic. Returns NOT_FOUND if the topic
does not exist. The message payload must not be empty; it must contain
either a non-empty data field, or at least one attribute.

UpdateTopic updates an existing topic. Note that certain properties of a topic are not
modifiable. Options settings follow the style guide:
NOTE: The style guide requires body: "topic" instead of body: "*".
Keeping the latter for internal consistency in V1, however it should be
corrected in V2. See
https://cloud.google.com/apis/design/standard_methods#update for details.

type SnapshotIterator struct {
// InternalFetch is for use by the Google Cloud Libraries only.
// It is not part of the stable interface of this package.
//
// InternalFetch returns results from a single call to the underlying RPC.
// The number of results is no greater than pageSize.
// If there are no more results, nextPageToken is empty and err is nil.InternalFetch func(pageSize int, pageToken string) (results []*pubsubpb.Snapshot, nextPageToken string, err error)
// contains filtered or unexported fields
}

type StringIterator struct {
// InternalFetch is for use by the Google Cloud Libraries only.
// It is not part of the stable interface of this package.
//
// InternalFetch returns results from a single call to the underlying RPC.
// The number of results is no greater than pageSize.
// If there are no more results, nextPageToken is empty and err is nil.InternalFetch func(pageSize int, pageToken string) (results []string, nextPageToken string, err error)
// contains filtered or unexported fields
}

CreateSnapshot creates a snapshot from the requested subscription.
If the snapshot already exists, returns ALREADY_EXISTS.
If the requested subscription doesn't exist, returns NOT_FOUND.

If the name is not provided in the request, the server will assign a random
name for this snapshot on the same project as the subscription, conforming
to the
resource name format (at https://cloud.google.com/pubsub/docs/overview#names).
The generated name is populated in the returned Snapshot object.
Note that for REST API requests, you must specify a name in the request.

CreateSubscription creates a subscription to a given topic.
If the subscription already exists, returns ALREADY_EXISTS.
If the corresponding topic doesn't exist, returns NOT_FOUND.

If the name is not provided in the request, the server will assign a random
name for this subscription on the same project as the topic, conforming
to the
resource name format (at https://cloud.google.com/pubsub/docs/overview#names).
The generated name is populated in the returned Subscription object.
Note that for REST API requests, you must specify a name in the request.

DeleteSnapshot removes an existing snapshot. All messages retained in the snapshot
are immediately dropped. After a snapshot is deleted, a new one may be
created with the same name, but the new one has no association with the old
snapshot or its subscription, unless the same subscription is specified.

DeleteSubscription deletes an existing subscription. All messages retained in the subscription
are immediately dropped. Calls to Pull after deletion will return
NOT_FOUND. After a subscription is deleted, a new one may be created with
the same name, but the new one has no association with the old
subscription or its topic unless the same topic is specified.

ModifyAckDeadline modifies the ack deadline for a specific message. This method is useful
to indicate that more time is needed to process a message by the
subscriber, or to make the message available for redelivery if the
processing was interrupted. Note that this does not modify the
subscription-level ackDeadlineSeconds used for subsequent messages.

ModifyPushConfig modifies the PushConfig for a specified subscription.

This may be used to change a push subscription to a pull one (signified by
an empty PushConfig) or vice versa, or change the endpoint URL and other
attributes of a push subscription. Messages will accumulate for delivery
continuously through the call regardless of changes to the PushConfig.

Pull pulls messages from the server. Returns an empty list if there are no
messages available in the backlog. The server may return UNAVAILABLE if
there are too many concurrent pull requests pending for the given
subscription.

StreamingPull (EXPERIMENTAL) StreamingPull is an experimental feature. This RPC will
respond with UNIMPLEMENTED errors unless you have been invited to test
this feature. Contact cloud-pubsub@google.com with any questions.

Establishes a stream with the server, which sends messages down to the
client. The client streams acknowledgements and ack deadline modifications
back to the server. The server will close the stream and return the status
on any error. The server may close the stream with status OK to reassign
server-side resources, in which case, the client should re-establish the
stream. UNAVAILABLE may also be returned in the case of a transient error
(e.g., a server restart). These should also be retried by the client. Flow
control can be achieved by configuring the underlying RPC channel.

UpdateSnapshot updates an existing snapshot. Note that certain properties of a snapshot
are not modifiable.
NOTE: The style guide requires body: "snapshot" instead of body: "*".
Keeping the latter for internal consistency in V1, however it should be
corrected in V2. See
https://cloud.google.com/apis/design/standard_methods#update for details.

UpdateSubscription updates an existing subscription. Note that certain properties of a
subscription, such as its topic, are not modifiable.
NOTE: The style guide requires body: "subscription" instead of body: "*".
Keeping the latter for internal consistency in V1, however it should be
corrected in V2. See
https://cloud.google.com/apis/design/standard_methods#update for details.

type SubscriptionIterator struct {
// InternalFetch is for use by the Google Cloud Libraries only.
// It is not part of the stable interface of this package.
//
// InternalFetch returns results from a single call to the underlying RPC.
// The number of results is no greater than pageSize.
// If there are no more results, nextPageToken is empty and err is nil.InternalFetch func(pageSize int, pageToken string) (results []*pubsubpb.Subscription, nextPageToken string, err error)
// contains filtered or unexported fields
}

type TopicIterator struct {
// InternalFetch is for use by the Google Cloud Libraries only.
// It is not part of the stable interface of this package.
//
// InternalFetch returns results from a single call to the underlying RPC.
// The number of results is no greater than pageSize.
// If there are no more results, nextPageToken is empty and err is nil.InternalFetch func(pageSize int, pageToken string) (results []*pubsubpb.Topic, nextPageToken string, err error)
// contains filtered or unexported fields
}